Channel occupancy time (COT) sharing propagation

Abstract

This disclosure provides systems, methods, and apparatuses, including computer programs encoded on computer storage media, for wireless communication. In one aspect of the disclosure, a method for wireless communication by a user equipment (UE) includes receiving a first message from a first device. The first device includes an originator of a first channel occupancy time (COT). The method may also include transmitting a second message including a source identity (ID) of the first device. Other aspects and features are also claimed and described.

What is claimed is: 
     
       1. A method of wireless communication performed at a user equipment (UE), comprising:
 receiving a first message from a first device, the first device includes an originator of a first channel occupancy time (COT); and 
 transmitting a second message including a source identity (ID) of the first device,
 wherein: 
 the second message further includes the location information associated with the first device, an indication of a threshold, or a combination thereof; and 
 the threshold includes one or more distance thresholds, one or more signal strength thresholds, an energy detection (ED) threshold, or a combination thereof. 
 
 
     
     
       2. The method of  claim 1 , wherein the first message includes first sidelink control (SCI) from the first device, the second message includes second SCI, or a combination thereof. 
     
     
       3. The method of  claim 1 , wherein the first message includes the source ID of the first device, sharing information associated with the first COT, or a combination thereof, and further comprising detecting, based on the first message, the source ID of the first device, the sharing information associated with the first COT, or a combination thereof. 
     
     
       4. The method of  claim 1 , wherein:
 the first message includes location information associated with the first device, an indication of a threshold, or a combination thereof; and 
 the location information includes coordinates associated with the first device, a zone identifier associated with the first device, or a combination thereof. 
 
     
     
       5. The method of  claim 1 , wherein the second message further includes a source ID of the UE, the sharing information associated with the first COT, or a combination thereof. 
     
     
       6. The method of  claim 1 , further comprising receiving a radio resource configuration (RRC) message from a base station, the RRC message including the indication of the threshold. 
     
     
       7. The method of  claim 1 , further comprising:
 determining whether to transmit the second message; and 
 selecting the threshold based on a determination the UE received the sharing information associated with the first COT directly from the first device. 
 
     
     
       8. The method of  claim 1 , further comprising:
 determining whether to transmit the second message; 
 determining an ED value; and 
 performing a comparison based on the ED value and the threshold, and 
 wherein determining whether to transmit the second message is based on a result of the comparison. 
 
     
     
       9. The method of  claim 1 , further comprising:
 after expiration of the first COT, receiving, from a third device, a third message including a source ID of a fourth device and second sharing information associated with a second COT, wherein the fourth device includes an originator of the second COT; and 
 determining whether to attempt access of a resource during the second COT based on the source ID of the fourth device, and wherein, prior to receiving the third message, the UE missed receiving the second sharing information associated with the second COT directly from the fourth device. 
 
     
     
       10. The method of  claim 1 , wherein the UE is configured for vehicle-to-everything (V2X) communication. 
     
     
       11. The method of  claim 1 , further comprising:
 receiving a second message including a second source ID of a second device, the second device includes a second originator of a second COT; and 
 determining whether to attempt access of a resource during the second COT based on the second source ID. 
 
     
     
       12. The method of  claim 11 , further comprising:
 attempting to access the resource during the second COT; and 
 wherein:
 the message is received from a third device and includes sidelink control information associated with the second device, sharing information associated with the COT, or a combination thereof, and 
 prior to receiving the second message, the UE missed receiving the sidelink information directly from the second device. 
 
 
     
     
       13. The method  claim 11 , further comprising:
 determining a distance between the UE and the first device; and 
 performing a first comparison based on the distance and a first threshold; or 
 measuring, based on the source ID, one or more sideline communications between the second device and the UE; 
 determining, based on the measurement of the one or more sideline communications, a signal strength associated with the second device and the UE, wherein the signal strength is associated with a reference signal received power (RSRP), a received signal strength indicator (RSSI), or a pathloss; and 
 performing a second comparison based on the signal strength and a second threshold, 
 wherein determining whether to attempt access of the COT is based on a result of the first comparison, a result of the second comparison, or a combination thereof. 
 
     
     
       14. The method of  claim 11 , further comprising:
 determining an energy detection (ED) value, the ED threshold included in the second message, is determined based on a radio resource configuration (RRC) message received by the UE, or a combination thereof; 
 performing a third comparison based on the ED value and an ED threshold; 
 wherein determining whether to attempt access of the COT is based on a result of the third comparison. 
 
     
     
       15. The method of  claim 11 , further comprising:
 receiving a third message from a fourth device, the fourth device includes a third originator of a third COT, the third message includes sidelink control information, the sidelink control information including a third source ID of the fourth device and sharing information associated with the third COT; and 
 transmitting a fourth message including a source ID of the UE, the source ID of the fourth device, the sharing information associated with the third COT, or a combination thereof. 
 
     
     
       16. A user equipment (UE) comprising:
 a transceiver configured to receive a first message from a first device, the first device includes an originator of a first channel occupancy time (COT); 
 at least one processor; and 
 a memory coupled with the at least one processor and storing processor-readable code that, when executed by the at least one processor, is configured to initiate transmission of a second message including a source identity (ID) of the first device, 
 wherein:
 the second message further includes the location information associated with the first device, an indication of a threshold, or a combination thereof; and 
 the threshold includes one or more distance thresholds, one or more signal strength thresholds, an energy detection (ED) threshold, or a combination thereof. 
 
 
     
     
       17. The UE of  claim 16 , wherein the first message includes first sidelink control (SCI) from the first device, the second message includes second SCI, or a combination thereof. 
     
     
       18. The UE of  claim 16 , wherein the first message includes the source ID of the first device, sharing information associated with the first COT, or a combination thereof, and further comprising detecting, based on the first message, the source ID of the first device, the sharing information associated with the first COT, or a combination thereof. 
     
     
       19. The UE of  claim 16 , wherein:
 the first message includes location information associated with the first device, an indication of a threshold, or a combination thereof; and 
 the location information includes coordinates associated with the first device, a zone identifier associated with the first device, or a combination thereof. 
 
     
     
       20. The UE of  claim 16 , wherein the second message further includes a source ID of the UE, the sharing information associated with the first COT, or a combination thereof. 
     
     
       21. The UE of  claim 16 , further comprising receiving a radio resource configuration (RRC) message from a base station, the RRC message including the indication of the threshold. 
     
     
       22. The UE of  claim 16 , further comprising:
 determining whether to transmit the second message; and 
 selecting the threshold based on a determination the UE received the sharing information associated with the first COT directly from the first device. 
 
     
     
       23. The UE of  claim 16 , further comprising:
 determining whether to transmit the second message; 
 determining an ED value; and 
 performing a comparison based on the ED value and the threshold, and 
 wherein determining whether to transmit the second message is based on a result of the comparison. 
 
     
     
       24. The UE of  claim 16 , further comprising:
 after expiration of the first COT, receiving, from a third device, a third message including a source ID of a fourth device and second sharing information associated with a second COT, wherein the fourth device includes an originator of the second COT; and 
 determining whether to attempt access of a resource during the second COT based on the source ID of the fourth device, and wherein, prior to receiving the third message, the UE missed receiving the second sharing information associated with the second COT directly from the fourth device. 
 
     
     
       25. The UE of  claim 16 , wherein the UE is configured for vehicle-to-everything (V2X) communication. 
     
     
       26. The UE of  claim 16 , further comprising:
 receiving a second message including a second source ID of a second device, the second device includes a second originator of a second COT; and 
 determining whether to attempt access of a resource during the second COT based on the second source ID. 
 
     
     
       27. An apparatus configured for wireless communication, the apparatus comprising:
 means for receiving a first message from a first device, the first device includes an originator of a first channel occupancy time (COT); and 
 means for transmitting a second message including a source identity (ID) of the first device, wherein: 
 the second message further includes the location information associated with the first device, an indication of a threshold, or a combination thereof; and 
 the threshold includes one or more distance thresholds, one or more signal strength thresholds, an energy detection (ED) threshold, or a combination thereof. 
 
     
     
       28. A non-transitory computer-readable medium storing instructions that, when executed by a processor, cause the processor to perform operations comprising:
 receiving a first message from a first device, the first device includes an originator of a first channel occupancy time (COT); and 
 initiating transmission of a second message including a source identity (ID) of the first device, wherein: 
 the second message further includes the location information associated with the first device, an indication of a threshold, or a combination thereof; and 
 the threshold includes one or more distance thresholds, one or more signal strength thresholds, an energy detection (ED) threshold, or a combination thereof.